ring-android/app/src/main/res/menu/conversation_actions.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">

    <item
        android:id="@+id/conv_action_videocall"
        android:icon="@drawable/ic_videocam_white_24dp"
        android:title="@string/ab_action_video_call"
        app:showAsAction="always" />

    <item
        android:id="@+id/conv_action_audiocall"
        android:icon="@drawable/ic_call_white_24dp"
        android:title="@string/ab_action_audio_call"
        app:showAsAction="always" />

    <item
        android:id="@+id/menuitem_addcontact"
        android:icon="@drawable/ic_person_add_white_24dp"
        android:title="@string/ab_action_contact_add"
        app:showAsAction="ifRoom" />

</menu>